Improvement in malt-kiln floors



F. BAUMANN. Malt-Kiln F1001.

No. 212,645.. Patented Feb. 25,1879.

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FREDEMCKBAUMANN, 4:on CHICAGO, ILLiNCIs.

IMPnovEMEN-r IN MALT-KILN FLooRs.`

Specification forming part of Ifetters Patent No. 212,645, datedFebruary 25, 1879; application iilcd July 16, 1878.

To all whom 'it may concern:

B'e it known that l', FREDERICK BAUMANN, of the city of Chicago, countyof Cook, State of Illinois, have invented new and useful Improvements inMalt-Kiln Floors, of which the following is a full and accuratedescription, reference being' had to the accompanying drawings, whichforni part and parcel ot' this specification.

The nature of my invention relates to that class of malt-kiln floorswhich are composed or constructed of equidistant parallel floor.- bars,secured to and supported by notched cross-bars.

The peculiarity of my cpnstruction is, that my floor-bars aremadewithconcave or grooved sides, into which the metal of thebridges leftbetweenthe notches ofthe cross-bars is crowded by means of upsetting. i

Besides, Ipropose to make a very strong, substantial, and durablemalt-kiln floor, which, at the same time, and nevertheless, containsair-spaces between the floor-bars to the amount of from thirtythree toforty-two per cent. of the whole surface--a 'result which has, in thecombination of bothl points, never before been accomplished.

I have also a peculiar method of uniting the several sections of whichthe malt-kiln tloor is composed, and which are previously made in someworkshop, with` the intention of forming a whole and unbroken iioorafter uniting.

My cross-bars project beyond the edgesof the section of which they forma part. These projections of one section meet those ot' another section,and a rivet, bolt', or screw is passed through a hole prepared intheprojections, c

In the drawings, Figure l` is a perspective view of a portion of mymalt-kiln door; Fig. 2, an enlarged sectional view of the same.

A A are the :floor-bars, which I propose to make on'etenth to one-ninthot' aninch wide at the upper edge; one-thirteenth to onetwelfth of aninch wide through the rounded lower part; one ninth to oneeighth of aninch deep from top to bottom; one-fifteenth to one-fonrteenth ofan inchwide across the concaved points.

The concave or grooved floor-bars are produced by the known process ofdrawing through dies. I would so space these iloorbars as to leaveairspaces ibetween them which do not exceed one-sixteenth of an inch inwidth.

B B are the cross-bars, with their equidistant notches, which arepunched or otherwise cut into the upper edges ot the cross-bars. Thesenotches are of less depth than are the door-bars A, and so shaped as toallow the floor-bars A to be inserted from the top. The iioorbars A,being thus inserted v`into the notches of the cross-bars B, are thensecured to and with the said cross-bars B by upsetting the bridges leftbetween the said notches, by

which means themetal of these bridges is crowded into the side groovesof the floorbars A, so as to firmly clasp and hold them.

These cross-bars B, I propose to make, say, one-sixteenth .of an inch inthickness, one and one-eighth inch in depth, and two feet in length, andplace them from two to two and one-half inches apart from eachother.Their ends are so trimmed as to leave standing a full bridge beyond theextreme notch, and then project in its lower portion about onefourth ofan inch beyond this point, having in this projection a hole for unitingthe several sections coinposin g the iioor. These sections I propose tomake about twelve feet bars B.

I further propose to unite the several sections composing the malt-kilnoor so as to break their joints. I accomplish this by uniting theCentral cross-bar of one tile with the l extreme crossbars of four otheradjoining tiles, (two at each side.)

The support of this malt-kiln floor is assumed to be a rigid ironconstruction of I- 2 i einem beams, which are madeto form part of thegrooves of the Hoor-bars, substantilly as -n building. for the purposesetforth.

What'l' claim as my invention is- A malt-kiln oor composed of Hoor-barsFREDERICK BAUMANN' A, having concave or grooved sides, and se-Witnesses: cured to the notched Ycross-bars B by upset- E. JEBSEN,

ting the met-a1 of the cross-bars into the side EMiL H. FROMMANN.

